allegation
al·le·ga·tion
/ˌælıˈgeıʃən/ noun , pl -tions [ count ]
: a statement saying that someone has done something wrong or illegal
The police are investigating allegations that the mayor has accepted bribes.
The mayor denies the allegations (that have been made) against him.
There have been allegations of fraud in the city government.
You're making a serious allegation. Do you have any proof?